This study explored the ability of 14 individuals with autism to generate a unique series of digits. Individuals with autism were more likely to repeat previous digits than comparison individuals, suggesting they may exhibit a shortfall in response inhibition. Results support the executive dysfunction theory of autism. (Contains references.)…

Three variables (diagnosis, location of cues, and mental age of learners) influencing stimulus control and stimulus overselectivity were assessed with eight autistic children (mean age 12 years) and eight average children matched for mean age. Among results were that autistic subjects tended to respond overselectively only in the extra-stimulus…

This review of the literature on the neuropsychology of autism identifies several consistent findings, such as: existence of neuropsychological impairments in a wide range of domains; large individual differences in certain neuropsychological domains; greater difficulty with tasks involving social information; possible association of the amygdala…

The matching-to-sample performances of three young adults with autism and four children (ages four to nine) without intellectual disabilities were examined in three experiments using complex sample stimuli. Results for all subjects showed that each of two redundant relevant sample elements and their respective comparison stimuli were substitutable…

This study examined conceptual relationships in semantic memory using an indirect priming technique in high-functioning autistic adolescents and controls. The autistic subjects and controls showed similar semantic priming effects. However, correlations with nonverbal cognitive measures for the autistic subjects suggests that semantic processing in…

Systematic naturalistic observations of imitation, theory of mind, play, and social contact were conducted with children with autism, adults with autism, children with learning disabilities, and normally developing young children. Although little imitation was observed in any but the normal young children, the autistic subjects showed less…

This study compared children (n=68) with either autism or general delay on false belief tasks and tasks to test for an understanding of interpretive diversity. Findings partially support the view that tasks of understanding interpretive diversity are more difficult than false belief tasks. Between-group differences in the consistency and quality…

This study investigated how 15 preadolescents and adolescents with autistic spectrum disorder (ASD) performed on false belief tasks that included social inferencing of psychological states as well a logical inferencing of physical states. Unlike the control groups, the ASD group performed better on the social inferencing tasks and use of a prompt…

This study examined the understanding of others' intentions in 21/2- to 5-year-old children with autism and a control group of children with other developmental delays. No significant between-group differences were found, although within-group patterns suggested that children with autism may have a slightly less complex understanding of others'…

This study compared the social problem solving skills of 15 adolescents with Asperger's syndrome with 15 typically developing adolescents. Subjects were presented with videotaped scenarios. The Asperger's group showed deficiencies in recounting pertinent facts, generating possible high-quality problem solutions, and selecting optimal and preferred…

This evaluation of thought disorders in 11 high functioning autistic young adults and older adolescents found poverty of speech, poor reality testing, perceptual distortions, and areas of cognitive slippage. In comparison with a schizophrenic reference group, autistic subjects demonstrated more poverty of speech and less illogic as well as similar…

This study compared working memory in 28 high-functioning autistic individuals (ages 7-18) with that of 30 individuals with Tourette Syndrome or typically developing. No group differences were found. Performance was significantly correlated only with age and IQ. Results suggest that working memory is not an executive function seriously impaired in…

Three groups of 10 children matched on verbal mental age (either with autism, with Down syndrome, or normally developing) attempted to imitate single pretend acts and a series of pretend acts that formed a script. Although children with autism were best on the single-act imitation, they demonstrated specific difficulties on the script imitation.…

Comparison of area and subtest scores on the Stanford Binet Intelligence Scale (Fourth Edition) for 15 autistic retarded children and 15 nonautistic retarded children found that the children with autism scored substantially lower in the verbal reasoning area and on the subtests of Comprehension and Absurdities than did the nonautistic children.…

Attention processes in 103 children and adults with high functioning autism were compared with a matched control group using a battery of attention measures. Differences were found only on tasks which placed demands on cognitive flexibility or psychomotor speed, suggesting that purported attention deficits in autism may actually be primary…